<div class="mobileApp">
    <svg aria-hidden="true" ><use xlink:href="#icon-github"></use></svg>
    <svg aria-hidden="true" ><use xlink:href="#icon-zhihu-circle-fill"></use></svg>
    <svg aria-hidden="true" ><use xlink:href="#icon-QQ"></use></svg>
    <svg aria-hidden="true" ><use xlink:href="#icon-weixin"></use></svg>
</div>